Career

From my first job at a systems integrator in 2016 to where I am now.

1. 2016

   Graduated from Hokkaido University, started out at a systems integrator

   After a master's in condensed matter physics, I joined a systems integrator as a systems engineer building network and server infrastructure. I covered the whole span from proposal through requirements, design, build and operations, and led projects as a manager.

2. 2019

   Moved to a security vendor

   Technical support engineer for enterprise security products, working on log analysis and deep troubleshooting. Automating my own work in Python is what got me interested in programming.

3. 2021

   Became a web application engineer

   After studying on my own and at a bootcamp, I moved onto a large financial media product. As development team lead and scrum master I led both new feature work and the running of the team.

4. 2024

   Went independent

   I carried on with the financial media work I had been doing as an employee, now under contract, and began taking on several projects in parallel, working fully remotely with teams in Japan.

5. 2025

   Joined a U.S. company's development project

   An application sent from Canada led to a contract with a U.S.-headquartered company. Working in English, I used AI-driven development to pick up .NET, a stack I had never touched, and saw the six-month project through to completion.

6. 2025–2026

   A large-scale replacement and an AI-driven development rollout, in parallel

   On the replacement of a major Japanese blogging service, I led the design and build of the staff-facing admin system in Python, largely on my own, and drove the team's adoption of Claude Code alongside it. In parallel I brought AI-driven development to a SaaS for the transport industry: setting up CLAUDE.md, CI/CD and a spec-driven development guide, taking stock of the technical debt across a Laravel application with more than 200 controllers, then joining the team to build in Laravel and React with TypeScript.

7. 2026

   From Canada to the U.S.

   While living in Canada I worked fully remotely on projects in Japan and North America. In 2026 I moved to Colorado. The move has not slowed the work down: I keep building my own tools, putting Claude Code and Codex CLI to the test, and publishing what comes out of it through the book, Udemy, YouTube and the community.